243213111443 has 4 divisors (see below), whose sum is σ = 247802038128. Its totient is φ = 238624184760.

The previous prime is 243213111391. The next prime is 243213111457. The reversal of 243213111443 is 344111312342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243213111443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243213111343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294463263 + ... + 2294463368.

It is an arithmetic number, because the mean of its divisors is an integer number (61950509532).

Almost surely, 2^243213111443 is an apocalyptic number.

243213111443 is a deficient number, since it is larger than the sum of its proper divisors (4588926685).

243213111443 is an equidigital number, since it uses as much as digits as its factorization.

243213111443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588926684.

The product of its digits is 6912, while the sum is 29.

Adding to 243213111443 its reverse (344111312342), we get a palindrome (587324423785).

The spelling of 243213111443 in words is "two hundred forty-three billion, two hundred thirteen million, one hundred eleven thousand, four hundred forty-three".